Bracket engine, what would you build and why?

Thats a nice looking car Jeff, like it......personally I think a nice simple 440 would be the way to go for consistent 10.0's, as has been said though there's many ways to skin this cat...as you are only at 2560lbs race weight, it should be a simple cost effective motor, something similar perhaps to what I ran back in 1990, was a '69 Cuda at 3000lbs all in, back halved L/bars-coil-overs, with 14x32 Hoosiers/4.88's with 35sp spool/shafts, manual 727 with a 4500 8", all a bit overkill for such a tiny motor but it was real consistent, the motor specs>

+.030" stock 440-6pk bottom end (man that was heavy), balanced/printed..around 9.9:1CR
Mild ported 906's with 2.14/1.81, approx 260cfm
The Old CC solid flat tappet cam .650"/.650", [email protected], for top end
Team G intake, 850DP, 2" fenderwells
Single line Milodon external.

Not the spec I'd have today but it worked well, pulled like a train top end, this motor made only 485 fly hp and ran 10.71@124, reckon there was .60 or 50 in it with some more messing, shifted at 6400 ran through at 6500, 60's were 1.46's.
Something like that old plodder of a motor in your weight would run 10.1's, but there's a ton of better parts you could add to that these days, like carbs and intakes, a pair of ootb Eddys at 288cfm and a bit more CR and even less cam than I had and you'd be too quick for that 10.0. Keep it simple and cheap, all the best with it.

hers's a pic....